# Explorer

The **Cartesi Node Explorer** is a web UI for navigating the entities exposed by the
[Cartesi Rollups Node JSON-RPC API](https://github.com/cartesi/rollups-node) (v2.0.0, the
current alpha). It follows the natural hierarchy of the API:

```
Node
└── Applications
    ├── Epochs ──────────────► Inputs · Outputs · Reports · Tournaments (per epoch)
    ├── Inputs ──────────────► Outputs · Reports (per input)
    ├── Outputs (Notice / Voucher / DelegateCallVoucher, decoded)
    ├── Reports
    └── Tournaments (PRT) ───► Commitments · Matches ─► Match advances
                               └── Child tournaments (recursive)
```

Every list is paginated, sortable, and filterable (epoch, input, sender, output type,
voucher address, status, …), and filters are kept in the URL so any view is shareable.
Detail pages cross-link related entities — an epoch links to its inputs, an input to the
outputs and reports it produced, an epoch under dispute to its tournament.

* **Live site:** [explorer.deroll.dev](https://explorer.deroll.dev)
* **Writing decoders:** [`@deroll/decoder`](/explorer/decoders) turns raw payloads into readable summaries.

## Packages

| Package | Description |
| --- | --- |
| [`@deroll/decoder`](/explorer/decoders) | Typed toolkit for writing payload decoders. |
| `@deroll/json-decoder` | Example decoder for plain-JSON payloads. |
| `@deroll/mock-server` | Mock Rollups Node JSON-RPC server for developing the explorer locally. |